Fig. 2
XPS spectra of TPP-PEI (a). FT-IR of TPP-PEI (b). TEM image of Ce6-TPP-PEI. The scale bar corresponds to 80 nm (c). Average size distribution TPP-PEI (d) and Ce6- TPP-PEI (e). The electrostatic surface potential of free Ce6, TPP-PEI, E. coli cell and Ce6-TPP-PEI in an 0.9% NaCl solution, the data are presented as mean ± SD (n = 3) (f). Absorption spectra of free Ce6, TPP-PEI, and Ce6-TPP-PEI in pure water (g). Relative fluorescence intensity of the ROS of a solution of Ce6-TPP-PEI or TPP-PEI in the presence or absence of light irradiation (30 mW/cm2). DCFH was used as a probe, and PBS was set as a control. The data are presented as mean ± SD (n = 3) (h). Fluorescent detection of ROS generation of a solution of Ce6-TPP-PEI or TPP-PEI in the presence or absence of light irradiation (30 mW/cm, 80 s). DCFH was used as a probe, and PBS was set as a control. The data are presented as mean ± SD (n = 3) (i)